This question needs some more justice, though I don't want to provide javascript code (examples and discussion of which can be found at this SUN forums thread, reply 27 is a summary). This is particularly relevant for frameworks that appear on the stack before application code, such as Struts and Spring - or the application server itself, for that matter.Ĭode is early stages yet, but is on GitHub under ThrawnCA/security-manager.git Then, if the application code has permission to perform an action, the guest pass for the library will be honored, and the action will succeed but if the library tries to take an action without the application code present (which might happen due to, eg, crafted input from a remote attacker), then the guest pass by itself will not be enough and the action will fail. So, instead of granting AllPermission to the library, you could grant it GuestPass(AllPermission). It will introduce the idea of 'guest pass' permissions, that allow a class to be present on the call stack iff there is also a class on the stack that holds the real permission. I'm currently working on a custom SecurityManager implementation that could provide a solution to this issue. This noncompliant example grants AllPermission to the klib library: Noncompliant Code Example (Security Policy File) These newly loaded classes could be placed into any protection domain by the class loader, thereby automatically granting the classes the permissions for that domain. Malicious applications that can instantiate their own class loaders could then load their own rogue classes into the system. This is an extremely dangerous permission to grant. Permissions in the Java SE 6 Development Kit states: A custom class loader can define a class (or ProtectionDomain) with permissions that override any restrictions specified in the systemwide security policy file. This permission is extremely dangerous because malicious code can create its own custom class loader and load classes by assigning them arbitrary permissions. The permission applied to target createClassLoader grants code the permission to create a ClassLoader object. This includes not only public, but protected and private fields and methods as well. Warning: Extreme caution should be taken before granting this permission to code, for it provides the ability to access fields and invoke methods in a class. As a result, ReflectPermission must never be granted with target suppressAccessChecks.Īccording to the technical note Permissions in the Java SE 6 Development Kit, Section ReflectPermission, target suppressAccessChecks: Consequently, the permitted class can obtain permissions to examine any field or invoke any method belonging to an arbitrary class. Granting ReflectPermission on the target suppressAccessChecks suppresses all standard Java language access checks when the permitted class attempts to operate on package-private, protected, or private members of another class. Never grant AllPermission to untrusted code. This permission is dangerous in production environments. Code is typically granted AllPermission via the security policy file it is also possible to programmatically associate AllPermission with a ProtectionDomain. This facility was included to reduce the burden of managing a multitude of permissions during routine testing as well as when a body of code is completely trusted. The permission grants all possible permissions to code. Other permissions should be granted only to special code. Scripps National Desk.Certain combinations of permissions can produce significant capability increases and should not be granted. In May, alt-right protesters held a torchlight rally in an effort to prevent city officials from removing Confederate monuments in the city.Īlex Hider is a writer for the E.W. The KKK applied for a permit to hold a rally in Charlottesville, Virginia earlier this month, and is likely to be given permission to hold the rally. In February, the group distributed Valentine’s Day-theme recruitment flyers that encouraged white people to “love their race.” reports that are KKK members have used recruitment flyers in the past. The baggies also contained kitty litter to presumably help weigh down the flyers and prevent them from blowing away. “The Kool Kids Klub wants you,” the flyers reportedly said. According to, the flyers advertised a July Klan rally in Charlottesville, Virginia. The Fulton County Sheriff’s Office posted on Facebook on Saturday that the group left baggies containing informational flyers in the yards of homes in Northville, New York. Police in upstate New York say that members of the Klu Klux Klan are attempting to recruit children to their organization with flyers targeted to kids.
0 Comments
Leave a Reply. |